PORT NUMBERS

PORT NUMBERS

(last updated 2010-01-15)

The port numbers are divided into three ranges: the Well Known Ports,
the Registered Ports, and the Dynamic and/or Private Ports.
The Well Known Ports are those from 0 through 1023.
DCCP Well Known ports SHOULD NOT be used without IANA registration.
The registration procedure is defined in [RFC4340], Section 19.9.
The Registered Ports are those from 1024 through 49151
DCCP Registered ports SHOULD NOT be used without IANA registration.
The registration procedure is defined in [RFC4340], Section 19.9.
The Dynamic and/or Private Ports are those from 49152 through 65535
A value of 0 in the port numbers registry below indicates that no port
has been allocated.

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* PLEASE NOTE THE FOLLOWING: *
* *
* IESG STATEMENT TO THE IANA *
* THE IESG BELIEVES THAT IANA MAY ALLOCATE AN ADDITIONAL PORT IN *
* THE 'USER PORT' RANGE TO PROTOCOLS WHOSE CURRENT PORT ALLOCATION *
* REQUIRES ACCESS TO A PRIVILEGED PORT. THIS ALLOCATION SHOULD NOT *
* BE AUTOMATIC, BUT MAY OCCUR UPON APPLICATION BY AN INTERESTED *
* PARTY WHOSE APPLICATION WOULD OTHERWISE FIT IANA'S POLICIES. *
* *
* 1. UNASSIGNED PORT NUMBERS SHOULD NOT BE USED. THE IANA WILL ASSIGN *
* THE NUMBER FOR THE PORT AFTER YOUR APPLICATION HAS BEEN APPROVED. *
* *
* 2. ASSIGNMENT OF A PORT NUMBER DOES NOT IN ANY WAY IMPLY AN *
* ENDORSEMENT OF AN APPLICATION OR PRODUCT, AND THE FACT THAT NETWORK *
* TRAFFIC IS FLOWING TO OR FROM A REGISTERED PORT DOES NOT MEAN THAT *
* IT IS "GOOD" TRAFFIC. FIREWALL AND SYSTEM ADMINISTRATORS SHOULD *
* CHOOSE HOW TO CONFIGURE THEIR SYSTEMS BASED ON THEIR KNOWLEDGE OF *
* THE TRAFFIC IN QUESTION, NOT WHETHER THERE IS A PORT NUMBER *
* REGISTERED OR NOT. *
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